Role of Diffusion Weighted Imaging (DWI) for Hepatocellular Carcinoma (HCC) Detection and its Grading on 3T MRI: A Prospective Study

详细信息    查看全文

• 作者：Shiva Shankar^* ; Naveen Kalra^* ; ^{navkal2004@yahoo.com} ; Anmol Bhatia^&dagger ; ; Radhika Srinivasan^&Dagger ; ; Paramjeet Singh^* ; Radha K. Dhiman^§ ; ; Niranjan Khandelwal^* ; Yogesh Chawla^§ ;
• 关键词：ADC ; apparent diffusion coefficient ; DCEMR ; dynamic contrast enhanced magnetic resonance ; DWI ; diffusion weighted imaging ; HASTE ; half-Fourier acquisition single-shot turbo spin echo ; HCC ; hepatocellular carcinoma ; TSE ; turbo spin echo ; VIBE ; volume interpolated breath hold examination
• 刊名：Journal of Clinical and Experimental Hepatology
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：6
• 期：4
• 页码：303-310
• 全文大小：1714 K
• 卷排序：6

文摘

Limited studies have evaluated the role of diffusion weighted imaging (DWI) and apparent diffusion coefficient (ADC) for histologically grading the hepatocellular carcinoma (HCC).ObjectiveTo compare the efficacy of DWI with dynamic contrast enhanced magnetic resonance (DCEMR) in detection of HCC in cirrhosis, and to evaluate whether DWI can be used instead of DCEMR.Methods20 patients of either sex with cirrhosis and suspected of having HCC on screening USG were included in this prospective study approved by the Institutional Ethics Committee. All patients underwent DCEMR of the abdomen on 3T scanner and fine needle aspiration of the lesions. MR protocol included T1WI, T2WI, DWI, and dynamic CEMR. The results of diffusion weighted imaging were compared with DCEMR to find the efficacy of DWI vis-à-vis CEMR.ResultsDWI had a sensitivity and specificity of 100%, for diagnosis of lesions in cases having single lesion on CEMR, and sensitivity of 75% and specificity of 100% for diagnosis of lesions in cases having multiple lesions. There was a decreasing trend of ADC values with increasing grade of the tumor; however, the decreasing trend was not statistically significant. A cut-off ADC value of 0.8705 resulted in a sensitivity of 75% and specificity of 50% for differentiating between well-differentiated and other grades of HCC.ConclusionDWI can be used as an alternative for the detection and characterization of HCC, especially in patients with impaired renal function or contrast allergies precluding the use of contrast. In addition, DWI with ADC measurement may be helpful for non-invasive and preoperative prediction of the degree of differentiation of HCC.